The world’s infrastructure is crumbling, so we’re seeing a rise in bridges that need to be replaced. That’s good news for the companies that build those bridges and for those of us that enjoy a good demolition video. People have certainly gotten more creative with how these demolitions are filmed and this latest video your about to see gives you the ability to see the same demolition from 4 different angles and in different speeds.
The Merafield Bridge, near Plymouth, England was built in 1969 and has suffered from Alkalai-Silica Reaction, which is commonly referred to as “concrete cancer.” Alkalai-Silica Reaction creates spalling due to a gel being formed inside the concrete that expands with water. As the gel expands, pressure builds up in the structure and the concrete cracks. The demolition of the old bridge is part of a $9.1 million (£6.3 million) project that will also include a brand new 262 foot long (80m) bridge. The new bridge will require 2,503 tons of concrete and 401 tons of steel.
In order to bring down the old bridge, crews drilled 278 holes and packed in 110 pounds (50kg) of explosives, according to the Daily Mail. The end result was a middle of the night fireworks show followed by a giant cloud of smoke. You can watch the incredible footage, uploaded to Youtube by SWNS TV, below:
On Monday morning, a 13 story building in Miami Beach that was being prepped for demolition suddenly collapsed, injuring one Project Manager that was struck by debris.
In January of 2018, ten construction workers were killed and another eight were injured when a bridge spanning the Chirajara canyon in Columbia partially collapsed. That collapse has since been blamed on a poor design, reports have stated. Last week, the remaining sections of the bridge were demolished in dramatic fashion.
A couple weeks ago, we shared a list of the 100 tallest buildings to ever be demolished. One of the most interesting things that I learned while researching for that article was that although Detroit’s Greater Department Hudson Store was not the tallest building on the list (it was #21), it was the tallest on the list to actually be imploded.
In February, JP Morgan Chased announced their plans to demolish their current 52-story headquarters located in Manhattan. Turns out, when that demolition is complete, it will also break the record for the tallest building ever voluntarily demolished.
One thing’s for sure, the only thing better than one structure being demolished is two structures being demolished at the same time. Late last week, a decommissioned Florida Power Plant saw to the implosion of two 462 feet tall cooling towers in spectacular fashion.
Demolitions by implosion seems like the easiest way to knock down a structure, but there is so much preparation that goes into it that even the slightest mistake can have a huge impact. When smokestacks are demolished correctly, it can be a thing of beauty, like when these two silos in Scotland hit each other midair or when this asbestos filled stack was precisely demolished to fall into a pool of water. Things didn’t go so smoothly for demolition crews in Denmark last week, however.
As we’ve seen in the past, demolitions aren’t all about implosions. There are still many manual demolitions that are carried out by skilled excavator operators. The Victoria Street Bridge in Ontario, Canada is a recent example of that.
It’s been a while since we have shared a demolition video on Construction Junkie. We recently discussed a very high profile demolition project, the tallest voluntary demolition on record, which is schedule to start next year and how it is expected to happen, but no videos. Between the cold weather in most of the country and the general lack of interesting demolitions happening, it’s good to finally be back to feeling normal around here.
A couple weeks ago, JP Morgan Chase announced that they planned to demolish their existing 52-story Manhattan headquarters, which is believed to be the tallest voluntary demolition in history, in order to build a 70 story, 2.5 million square foot building in its place. The move left preservationists upset at the idea of scrapping the nearly 60 year old building and others wondering how exactly they were going to safely demolish a building that tall in such a congested and busy area.
This year saw more videos with environmental considerations taken into account, especially over waterways. Instead of imploding entire bridges, the part that spanned over top of the waterway were manually removed. I've also grown an appreciation for in-depth footage of demolitions that occurred under some interesting conditions. Some of the videos below show some extreme creativity to overcome obstacles.